<template>
  <div>
    <el-form ref="loginForm" :model="form" :rules="rules" label-width="80px" class="login-box">
      <h1 class="login-title">欢迎登录</h1>
      <el-form-item label="账号" prop="username">
        <el-input v-model="form.username"></el-input>
      </el-form-item>
      <el-form-item label="密码" prop="password">
        <el-input type="password" v-model="form.password"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="login('loginForm')">登录</el-button>
      </el-form-item>
    </el-form>
  </div>

</template>

<script>
    export default {
        name: "Login.vue",
        data() {
            return {
                form: {
                    username: '',
                    password: ''
                },

                // 表单验证，需要在 el-form-item 元素中增加 prop 属性
                rules: {
                    username: [
                        { required: true, message: '账号不能为空', trigger: 'blur' }
                    ],
                    password: [
                        { required: true, message: '密码不能为空', trigger: 'blur' }
                    ]
                }

            }
        },
        methods: {
            login : function(formName) {
                // 为表单绑定验证功能
                this.$refs[formName].validate((valid) => {
                    if (valid) {
                        // 设置用户登录成功
                        sessionStorage.setItem("isLogin" , "true");
                        this.$store.dispatch("asyncUpdateUser",this.form)
                        // 使用 vue-router 路由到指定页面，该方式称之为编程式导航
                        this.$router.push("/main");
                    } else {
                        this.$message.error('请输入登录信息!');
                        return false;
                    }
                });
            }
        }
    }
</script>

<style scoped>
  .login-title{
    text-align: center;
    margin: 0 auto 40px auto;
    color: #303133;
  }
  .login-box {
    border: 1px solid #DCDFE6;
    width: 350px;
    margin: 180px auto;
    padding: 35px 35px 15px 35px;
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    box-shadow: 0 0 25px #909399;
  }

</style>
